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Bussmann 170M2657 Class gR High-Speed Square Body Fuse, 35A
The Bussmann 170M2657 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding power electronics circuits. Rated 700V (UL) / 690V (IEC) AC, 35A, with a 200 kAIC interrupt rating, this Class gR fuse uses a square body design with slotted offset bolted tags for secure, low-resistance connections. Its gR utilization category delivers general purpose semiconductor protection where fast-acting current-limiting performance is required.
Key Features
- Voltage Rating: 700V (UL), 690V (IEC) AC for high-voltage semiconductor circuit protection.
- Amperage Rating: 35A for accurate overcurrent protection sized to the protected circuit.
- Interrupt Rating: 200 kAIC high-speed interrupting capacity for demanding fault-current conditions.
- Fuse Shape: Square body construction with slotted offset bolted tags for a secure, low-resistance mechanical and electrical connection.
- Utilization Category: Class gR (general purpose semiconductor protection) for fast-acting, current-limiting performance.
- Application: Purpose-built for semiconductor protection in power conversion and control equipment.
- Voltage Type: AC rated for alternating current systems.
Technical Specifications
- Amperage Rating: 35 A
- Application: semiconductor protection
- Compliances: Contact factory
- Fuse Shape: Square body, slotted offset bolted tags
- Insulated Metal Gripping Lugs (IMGL): No
- Packaging Type: Standard
- Product Height: 66 mm
- Product Length/Depth: 233 mm
- Product Weight: 235.3333333 g
- Product Width: 140 mm
- Utilization Category: gR (general purpose semiconductor protection)
- Voltage Rating: 690 V
- Voltage Type: AC
Typical Applications
- Semiconductor Device Protection Circuits
- High-Speed Fuse Applications for Power Electronics
- Rectifier and Power Conversion Equipment
- Industrial and Commercial Systems Requiring Class gR Protection
- Panels and Enclosures Housing Semiconductor Devices
Why Bussmann?
Bussmann engineers the 170M2657 with a robust square body design, slotted offset bolted tags, and a 200 kAIC interrupt rating to deliver dependable, code-conscious protection for semiconductor and power electronics equipment. The Class gR utilization category and 700V (UL) / 690V (IEC) voltage ratings reflect construction built for demanding industrial and commercial electrical environments. Choose Bussmann for high-speed fuse performance backed by Eaton Bussmann series engineering.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 35 A
- Application:
- semiconductor protection
- Class:
- Class gR
- Compliances:
- Contact factory
- Fuse Indicator:
- Other
- Fuse Shape:
- Square body, slotted offset bolted tags
- Insulated Metal Gripping Lugs Imgl:
- No
- Interrupt Rating:
- 200 kAIC
- Packaging Type:
- Standard
- Product Height:
- 66 mm
- Product Length Depth:
- 233 mm
- Product Weight:
- 235.3333333 g
- Product Width:
- 140 mm
- Utilization Category:
- gR (general purpose semiconductor protection)
- Voltage Rating:
- 690 V
- Voltage Type:
- AC
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse
Bussmann 170M2657 – Frequently Asked Questions
1) Will the Bussmann 170M2657 work on a 690V AC drive circuit?
Yes. The 170M2657 high-speed square body fuse is rated 700V under UL and 690V under IEC, on AC systems, at 35A. It is an AC-rated device, so don't apply it to a DC link without a DC rating for that application.
2) What does the gR class on the Bussmann 170M2657 mean, and is it different from an aR fuse?
gR is a full-range semiconductor fuse: it clears both overloads and short circuits, so it can protect the cable and the semiconductor together. That is the practical difference from an aR type, which is partial range and only handles short circuits, leaving overload protection to another device. The 170M2657 is catalogued with the gR utilization category for general purpose semiconductor protection.
3) Is the Bussmann 170M2657 a bolt-in fuse or does it clip into a holder?
Bolt-in. The 170M2657 uses a square body with slotted offset bolted tags, so it mounts on studs or bus bar and is torqued down for a low-resistance joint. You need a bolted mounting provision, not a clip-style fuse block. The slotted tags give you some adjustment on center distance during installation.
4) Does the Bussmann 170M2657 have insulated gripping lugs for hot swapping?
No. The 170M2657 is built without insulated metal gripping lugs (IMGL), so there are no insulated grips for handling. Isolate and lock out the circuit before removing it.
5) What fault current can the 170M2657 fuse interrupt?
200 kAIC. That covers the available fault current at most industrial service points feeding rectifiers, drives and power conversion gear, which is the duty this 35A high-speed fuse is built for.
6) How much room do I need in the panel for a Bussmann 170M2657?
Plan around 233 mm length/depth, 140 mm width and 66 mm height for the 170M2657, and about 235 g of weight hanging on the bus. Square body fuses of this size need clearance for the bolted tags and for a puller or gloved hand at replacement time.
7) Can I use the 170M2657 as a branch circuit or motor overload fuse?
That is not what it is for. The 170M2657 is a high-speed semiconductor fuse, sized and shaped to protect diodes, SCRs and IGBTs in rectifiers and power conversion equipment. For branch circuit, feeder or motor protection you want a conventional Class J, RK5 or CC fuse in the appropriate holder. Using a high-speed fuse in a general branch circuit typically results in nuisance opening on normal inrush.
8) What is the exact part number to order for this 35A Bussmann square body fuse?
Order Bussmann 170M2657. That is the full manufacturer part number, and the 170M series designation is what identifies the exact body size, ampere rating and tag configuration. Substituting another 170M number changes the body size or rating even when the amperage matches.
9) How does the 170M2657 ship, single piece or a carton quantity?
Standard packaging. The 170M2657 is a single square body fuse, so stocking spares means ordering the count you want rather than relying on a multi-pack.
How fast can I get the Bussmann 170M2657 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann 170M2657 come with a warranty?
Absolutely. The Bussmann 170M2657 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann 170M2657?
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installation tips, and troubleshooting. Contact Us
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